China Propylene glycol, Dipropylene glycol Suppliers & Manufacturers - TSR CHEM

URL: https://www.tsrchem.com/new-process-progress-of-polyether-polyos.html In response to the demand for polyurethane products, various polyether polyol products have emerged one after another, of which environmentally friendly, flame retardant and bio-based polyether polyols are the main representatives. At present, the development of environmentally friendly PU series products is receiving more and more attention. As the transitional blowing agent HCFC-141b is replaced, the research of the third generation blowing agent is getting deeper and deeper, and the HFC-type blowing agent represented by HFC-245fa and HFC-365mfa is the most ideal substitute for HCFC-141b at present. The corresponding HFC-245fa polyether polyol for polyurethane hard foam is also called the development focus of research institutions. The main domestic research and development enterprises and research institutes include enterprises such as Shandong Dongda Group and research institutes such as Jiangsu ...

URL: https://www.tsrchem.com/overview-of-polyether-polyols.html Polyether polyols are produced by the ring-opening polymerization of low molecular compounds containing active hydrogen, such as (alcohols, amines) as starting agents, with compounds containing epoxy structures under the action of catalysts. Polyether polyol can be generally divided into four categories.  One is poly propylene oxide polyol (PPG), which is made by polymerization reaction with propylene oxide or copolymerization reaction with propylene oxide and ethylene oxide with polyol or organic amine as the starting agent, and is the main product series of polyether polyol in China, and also the main product series used in polyurethane production. Secondly, it is polymer graft polyether polyol (POP), which is made by graft polymerization reaction of acrylonitrile or styrene with polyol, etc. It can obviously improve the hardness of soft polyurethane foam and enhance its load-bearing property, and i...

URL: https://www.tsrchem.com/polyether-polyol-production-process.html The main raw materials for the production of polyether polyols are starting agents, epoxides, catalysts, catalyst removers or deactivators, and post-treatment agents. The starting agents are low molecular compounds containing hydroxyl groups and low molecular compounds containing amino groups or hydroxyl and amino groups. Commonly used are propylene glycol, glycerol, trimethylolpropane, PTMEG, ethylenediamine pentaerythritol, xylitol, triethylenediamine, sorbitol, sucrose, bisphenol A, bisphenol S, tris(2-hydroxyethyl) isocyanate, toluenediamine, etc.; when using aromatic or heterocyclic polyol or polyamine starter, the above structure will be introduced into the polyether polyol structure, which can make the generated polyurethane material have better dimensional stability, and Heat and flame resistance. These starting agents include bisphenol A, bisphenol S, tris(2-hydroxyethyl) isocyanate, toluenediami...

URL: https://www.tsrchem.com/preparation-and-application-of-1-4-butanediol.html A primary alcohol with the chemical formula HOCH2CH2CH2CH2OH is butane-1,4-diol . It is a clear, thick liquid. It is one of butanediol's four stable isomers. preparation Acetylene interacts with two equivalents of formaldehyde in industrial chemical synthesis to produce butyne-1,4-diol.Butane-1,4-diol is produced by hydrogenating butyne-1,4-diol. In the Davy method, it is also produced on an industrial scale from maleic anhydride, which is first transformed into methyl maleate ester and then hydrogenated. Other pathways come from succinic acid, butadiene, and allyl acetate.A marketed biological approach to BD makes use of a genetically altered organism.4-hydroxybutyrate is the intermediary in the biosynthesis. Industrial use Industrial applications for butane-1,4-diol include usage as a solvent for the production of certain polymers, elastic fibers, and polyurethanes. Th...

URL: https://www.tsrchem.com/what-is-tetrahydrofuran-used-for.html Oxolane, also known as tetrahydrofuran (THF), is an organic molecule with the formula (CH2)4O. The substance is categorized as a cyclic ether, a kind of heterocyclic substance. It is an organic liquid that is colorless, water-miscible, and has a low viscosity. The principal application is as a precursor to polymers. THF is a multipurpose solvent since it is polar and has a large liquid range. The annual production of tetrahydrofuran is about 200,000 metric tons. The 1,4-butanediol is dehydrated using an acid catalyst in the most common industrial procedure. The process is comparable to that used to make diethyl ether from ethanol. Acetylene and formaldehyde are condensed to produce butanediol, which is then hydrogenated. By first oxidizing n-butane to crude maleic anhydride and then catalyzing hydrogenation, DuPont created a method for creating THF.A third significant commercial approach involves hydrogenat...

URL: https://www.tsrchem.com/industry-prospects-and-process-technology-for-n-methylpyrrolidone.html N-Methylpyrrolidone (NMP), (N-Methyl-2-pyrrolidone) is a non-protonic solvent characterised by high polarity, high boiling point, low viscosity, low volatility, high thermal and chemical stability. It has a wide range of applications as a high-performance solvent in the production of lithium-ion batteries, polymer synthesis, electronic chemicals, insulating paints and many other fields. NMP sources can be divided into two categories: synthetic NMP and recycled NMP. Synthetic NMP refers to the chemical synthesis of NMP products, the industrial production route is the condensation of γ-butyrolactone (GBL) and monomethylamine as raw materials to produce NMP products; recycled NMP refers to the recovery and purification of NMP waste liquid used as a solvent to achieve recycling. NMP market is huge and on the rise In the past 5 to 10 years, due to the rapid development...

URL: https://www.tsrchem.com/lithium-battery-industry-chain-continues-to-soar-n-methyl-pyrrolidone-nmp-leads-investment-boom.html Li-ion battery industry chain continues to experience high prosperity NMP consumption will continue to grow rapidly N-Methylpyrrolidone (NMP),（N-Methyl-2-pyrrolidone）is a very important auxiliary material for the production of lithium-ion battery electrodes and is the most commonly used solvent in the front-end dosing process of lithium-ion batteries. In the dosing stage, NMP is used as a solvent for PVDF to disperse the slurry, forming a homogeneous medium and maintaining the stability of the slurry for a long time within a certain viscosity range; in the coating stage, NMP is used as the main liquid carrier for the slurry and its good wettability and fluidity with the metal substrate helps the slurry to be evenly coated on the metal substrate with a stable thickness; in the coating and baking stage, NMP evaporates from the wet film ...